The invention relates to a building robot remote operation method in a virtual-real coupling space, which comprises the following steps: S1, establishing a building virtual model, and extracting position shape information of a building entity from the building virtual model; s2, obtaining construction scene point clouds, carrying out downsampling and filtering processing to obtain filtered point clouds, segmenting the filtered point clouds to obtain point clouds of all rooms of the construction scene and obstacle point clouds, wherein the point clouds of all the rooms of the construction scene and the obstacle point clouds jointly form environment point clouds; s3, registering the building virtual model and the environment point cloud to obtain a virtual-real coupling model; and S4, establishing remote communication between the virtual building robot and the real building robot through a Socket communication protocol, and achieving remote operation. According to the method, the virtual building robot is operated to work, the real building robot in the construction scene works synchronously, the constructors do not need to monitor on site, and the safety of the constructors is guaranteed.